<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
  <title>GG Circular</title>
                                         
  <meta http-equiv="content-type" content="text/html; charset=Shift_JIS">
</head>
  <body>
           
<div align="center"> <img src="GGCircular.GIF" alt="Title" width="564"
 height="54">
<font color="#000000">    </font>        
<div align="left">   
<div align="left">   
<div align="left">    A rigid spacecraft is subjected to a gravity gradient 
 torque in a circular<br>
   orbit.<br>
         <br>
   <b><u>Inputs<br>
 </u></b><br>
       <b>Ixx</b>,<b> Iyy, Izz </b>&#160;&#160; &#160;&#160;&#160; &#160;&#160;&#160; &#160;                  Principal 
moments of inertia<br>
   <br>
   <b><u>Initial Condition</u></b><br>
 <br>
   <b>w1</b>, <b>w2, w3</b>:                   &#160;&#160;&#160; &#160;&#160;&#160; &#160;&#160;&#160; Spacecraft angular 
velocities  <br>
        <b>q1, q2, q3, q4</b>:              &#160;&#160;&#160; &#160;&#160;&#160; Quaternions<br>
      <br>
         </div>
   </div>
   <br>
     </div>
     </div>
     <br>
    <br>
   <br>
   <br>
</body>
</html>
